fifty

noun

fif·​ty ˈfif-tē How to pronounce fifty (audio)
plural fifties
Synonyms of fiftynext
1
: a number equal to five times 10 see Table of Numbers
2
fifties plural : the numbers 50 to 59
specifically : the years 50 to 59 in a lifetime or century
3
: a 50-dollar bill
fiftieth adjective or noun
fifty adjective
fifty pronoun, plural in construction
fiftyish adjective

Examples of fifty in a Sentence

She is in her fifties. The bill for dinner came to $43, and she gave him a fifty.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Meanwhile, Vladimir is a slyly subversive 2022 novel about academia in which a once beautiful English professor, referred to only as M, has begun to feel the effects of aging in her late fifties, while her husband is just reaching his prime. Literary Hub, 14 May 2026 Only in her mid-fifties, Midge is busy and content in her life. Guy Lodge, Variety, 14 May 2026 But the book’s most valuable chapter might be the one about Bradley’s teaching in the nineteen-fifties, the section that supplies her with her title. Brian Seibert, New Yorker, 13 May 2026 Stojka came to painting decades later, in her mid-fifties, with the mission of depicting life in the concentration camps. Ben Davis, The New York Review of Books, 25 Apr. 2026 See All Example Sentences for fifty

Word History

Etymology

Middle English, from fifty, adjective, from Old English fīftig, from fīftig, noun, group of 50, from fīf five + -tig group of ten; akin to tīen ten

First Known Use

before the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of fifty was before the 12th century

Browse Nearby Words

Cite this Entry

“Fifty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fifty. Accessed 21 May. 2026.

Kids Definition

fifty

noun
fif·​ty ˈfif-tē How to pronounce fifty (audio)
plural fifties
: a number equal to five times 10 see number
fiftieth adjective or noun
fifty adjective or pronoun

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